US3146070A
Expired / Lapsed
US
⏱️ 0.0 years remaining
ph indicator unit
Assignee: Bayer Corp
•
Filing: 1960-04-18
•
Granted: 1964-08-25
•
Expires: 1980-04-18
Abstract
No abstract record available.
Inventors
- 👤 Galen F Collins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:55
CPC Classifications
G; G01; G01N; G01N31/00; G01N31/22; G01N31/221
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
A PH INDICATOR UNIT COMPRISING A BIBULOUS BODY CARRYING A HOMOGENEOUS MIXTURE CONSISTING ESSENTIALLY OF A PH INDICATOR DYE, ABOUT FROM 75% TO 98% BY WEIGHT OF POLYVINYL ALCOHOL AND FROM ABOUT 1.4 TO 25% BY WEIGHT OF A NON-VOLATILE, NON-IONIC SURFACE ACTIVE AGENT, SAID PROPORTION BEING EXCLUSIVE OF THE BIBULOUS BODY.
Claim 2
Dependent Claim
52 words
A PH INDICATOR UNIT COMPRISING A BIBULOUS BODY CARRYING A HOMOGENEOUS MIXTURE CONSISTING ESSENTIALLY OF A PH INDICATOR DYE, ABOUT FROM 75% TO 98% BY WEIGHT OF POLYVINYL ALCOHOL AND FROM ABOUT 1.4 TO 25% BY WEIGHT OF A NON-VOLATILE, NON-IONIC SURFACE ACTIVE AGENT, SAID PROPORTION BEING EXCLUSIVE OF THE BIBULOUS BODY.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-25 | 1968-02-24 | 1968-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-25 | 1972-02-24 | 1972-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-25 | 1976-02-24 | 1976-08-25 | $7700.00 | Window Closed / Lapsed |